Tool-holder



No. 748,725. PATENTED JAN. 5,1904. I

' B. 1M. W. HANSON.

TOOL HOLDER.

APPLICATION FILED SEPT. 25. 1902.

N0 MODEL Inwnbw 45 .36. 14 Jzidnsan By .fl?

1H: NORRKS PETERS co. PHOYO-L|YHIL wmnmmou. u. c.

no. 748,72 5. easier ;Tanuary 5, 1904.

UNiT D STATES PATENT OFFICE.

BENGT M. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT & WHITNEY COMPANY, OF HARTFORD CONNECTICUT, A CORPORATION OF NEW JERSEY.

TOOL-HOLDER. V

SPECIFICATION forming part of Letters Patent No. 748,725, dated January 5, 1904. Application filed September 25, 1902. Serial No. 124,778. (No model.)

T a w it y 007L067"! 7 my invention referred to. Fig. 3 is a plan Be it known that I, BENGT M. W. HANSON, view of the tool, showing one of the toola citizen of Sweden, and a resident of Hartholders in cross-section taken on the line 3 3 ford, in the county of Hartford and State of of Fig. 4. Fig. 4 is a front view of the tool 5 Connecticut, have invented certainnew and with the front plate or yoke removed. Fig. 55

useful Improvements in Tool-Holders, of; 5 is a rear view of the tool, showing one of which the following is a full, clear, and exact the back-rest holders in cross-section taken specification. through its longitudinal center. Fig. 6 is a This invention relates to tool-holders of the front view of the tool, showing a portion of class commonly known, as box-tools and the front plate broken away and illustrating 6o usually employed in the tool-turrets of lathes the adjustment of the tool-holder. Fig. 7 is and screw-machines. Tools of this class dean end view, and Fig. 8 a side view, of one rive their name from the circumstance that of the collars employed for clam ping the backoriginally and for many years these tool-holdrest jaws. Fig. 9 is a front view showing a ers were in the form of a boxpthe walls of modified construction of the adjusting means 6 which were mortised to hold the tools and for the tool-support, in which the adjustingthe codperating rests for engaging with the rod or abutment-post 15 is dispensed with. work. This form of support for the tool and The respective parts of this tool are mountrest was objectionable in the respect, among ed upon the plate 10, which is provided with others,that the work was practically inclosed a shank or stem 11 for fitting into the toolby the walls of the box while being operated turret of a turret-lathe or screw-machine in upon, so that it was diflicult .to watch the the well-known way, the stem being preferwork under operation and difficult also to ably provided with an axial bore 12, large supply oil and to remove the chips made by enough to permit a long piece of work of the 2 5 the tools. Moreover, these tools are expenfull capacity of the tool to pass through. To sive to construct, the frame orbox being usuthe plate 10 is firmly secured a series of pro ally cut out of a solid piece. Furthermore, jecting posts or rods 14, 15, 16, and 17, prothese tools are difficult to adjust and limited jecting forwardly in a parallel relation with in the extent of adjustment, besides being each other and with the axis of the work and 30 limited to the number of tools for which each are preferably connected and braced at their device is originally constructed. outer ends by means of the yoke-plate 18,

The principal object of the present invenwhich is firmly secured to the posts, and tion is to provide a simple and inexpensive braces them against the strains to which they tool-holder of this class which shall be open are subjected inoperation, the whole struc- 3 5 on all sides to permit of the ready inspection ture being strong and yet light and open, so of the work during the operations thereon as to allow of the entrance of oil, the exit of and to permit of the ready and ample applithe chips, and permit easy observation of the cation of oil or other cooling lubricant to the work at all times. work, be adapted to permitthe greatest pos- Upon the tool-post 14: are mounted the tool- 40 sible number of tools to be employed, and be supports 20, of which any desired number readily adjusted, and, withal, be firm and may be employed. These tool-supports are rigid when in operation on the work. clamped in place upon the posts 14 by means The invention further comprises improveof the screws 21 and are adjustable longiments in the manner of securing and adj usttudinally and in a swinging direction there- 45 ing the tools and their cooperating rests and on. The outer ends 22 of the tool-supports 9 5 of details of improvements, which will be are provided with adjusting-screws23, which hereinafter described, and pointed out in the bear against the post or rod 15, and thus claims. serve to support the tool firmly-and adjustit Figure 1 of the drawings is an end view, with precision to turn the work to the desired 50 and Fig. 2 a side view, of atool embodying diameter. The tools 25 are mounted in a mortise in the tool-support, preferably at an incline, as shown in Fig. 3, so that the cutting end of the tool may be projected to or beyond the front face of the tool-support.

The tools are disposed in a tangential relation to the work and are clamped in place by the set-screws 26, of which two are preferably employed, as herein shown. By drawing the tool 25 back and swinging the tool-support 20 forward, as shown in Fig. 6, the tool may be adjusted to any desired diameter of work.

In tools of this class it is customary and desirable to employ back-rests for supporting the work and prevent it from springing away from the tool under the strain of cutting away the stock by the tool,it being necessary to make these jaws adjustable readily to and from the center of the work to adapt them to different diameters. These backrests consist, as usual, of two jaws which are so disposed circumferentially of the work and relatively to the tool as to best resist the strains thrown upon the work by the tool. In the present instance the back-rest jaws 28 are mounted in the posts 16 and 17. Those portions of the posts which are between the plate 10 and the yoke-plate 18 are externally threaded and are also each provided with a slot 29, extending diametrically'through the posts and substantially from end to end thereof, as best shown in Fig. 5. The back-rest jaws 28 are fitted in these slots, so that they may be slid radially toward the center of the work or longitudinally of the posts 16 and 17. As a means for thus adjusting the jaws longitudinally and for clamping 'them securely in their adjusted positions the posts are provided with a series of nuts 30, fitting the thread upon the outsides of the posts, a pair of the nuts being employed upon each side ofeach jaw 28, as shown in Fig. 5. Practically all of the strain which is thrown upon these jaws when in operation tends to push them endwise in their seats-that is, in a direction radially away from the work. To resist this tendency, one side of each jaw is inclined, as also best shown in Fig. 5, and this inclined side of the jaw is seated in a transversely-slotted collar 31, provided with the slots 32, the bottoms of which are inclined in'accordance with the inclination of the side of the jaw 28 so that the outer side of the collar presents a fair surface for the adjacent nut 30 to bind squarely against, as best shown in Fig. 5.

When it is desired to adjust the jaws 28 longitudinally to suit the position of the tool or for any other reason, the nuts 30 are loosened and screwed along the post 16 or 17, as the case may be, and while the screws are thus loosened the jaw may be adjusted radially to its desired position. When the nuts are tightened,theinclined seat of the collar firmly opposes any backward movement of the jaw away from the work, since the jaw cannot be moved backwardly without stripping the threads or stretching the posts 16 or 17.

- into operation.

where no very heavy work is to be done or where for any reason the post 15 or the arm 22 may be in the way of other tools or may otherwise be found objectionable.

The posts 14, 15, 16, and 17 may be of any desired length to accommodate the required number of tool-supports or back-rest jaws or to suit the length of the work to be done. Additional posts may be provided,or for some kinds of work a smaller number may be employed, the application of the principles of this invention to the range or class of work to be performed being readily within the skill of workmen familiar with thisart. Where the work is short or where only one set of tools and back-rests are to be employed, the posts may be shortened to the required extent, and in that case the yoke-plate 18 may be dispensed with. The yoke-plate is readily removed for this purpose or for the purpose of enabling the tools and back-rests and their respective holders to be changed and adjusted. The posts, the tool, and jaw-support may also be transposed in position in various ways to suit the character of the work to be done.

An important advantage of this invention resides in the feature whereby several difierent diameters may be turned upon the work simultaneously by a number of the tools 25, held by the same tool-holder, since each of the tools 25 may be independently adjusted both longitudinally and radially with relation to the work, so as to turn any desired diameter or length of shoulder independently of its associated tool or tools. In tools of this class as heretofore employed upon tool-turrets of screw-machines and similar machines in which this invention finds its chief utility it has been customary to provide a separate tool-holder and tool for each shoulder or diameter to be turned upon the work, thereby employing a corresponding number of toolholding seats or faces of the turret and also requiring the turret to be indexed forwardly between each of the successive cuts, thereby not only monopolizing an undue amount of the turret capacity and requiring more time for the separate employment of the respective tools, but also employing more time because of the interruption of the work while indexing the turret to bring those successive tools In the toolholder of the present invention as many tools may be employed as there are shoulders in the work to be turned, so that all the difierent diameters and shoulders are completed simultaneously,

ICC

thus permitting the operations of the several tools to overlap to a greater or less extent.

In cases where it is desirable to adjust the back-rest jaws 28 well toward their respective ends of the tool-post 17 the outermost nuts 30 may be dispensed with and the right-hand jaw 28, as viewed in Fig. 5, may be clamped against the end wall of its slot in the post 17. Similarly the nut 30 at the left-hand end of that post may be omitted and the side of the adjacent collar 31 be seated directly against the plate 10. Any or all of theback-rest jaws and their respective clamping washers and nuts may also be reversed from the relation shown in Fig. 5. When the back-rest jaws are to be set closely together, the two intervening nuts 30 may be omitted and the back-rest jaws and their washers 31 may be clamped directly in contact by means of the nuts 30 on the outer sides of those jaws and washers. Various other adjustments and transpositions of these parts will obviously enable their positions to be adjusted to any desired extent to suit the character or the dimensions of the work to be done.

I claim as my invention 1. The combination in a tool of the class specified, movable longitudinally for feeding movement, of a base, a series of individual tool and back-rest posts projecting therefrom with free space between and around them for chips and oil, and a tool-support mounted upon and clasping the outside of one of the posts for, adjustment longitudinally of the post.

2. The combination in a tool of the class specified, movable longitudinally for its feeding movement, of a supporting-base, a series of individual tool and back-rest-posts projecting therefrom, with free space between and around them for chips and oil; and a removable yoke-plate for connecting and sustaining the outer ends of the posts.

3. The combination in a tool of the class specified, movable longitudinally for its feeding movement, of a supporting-base, a post secured thereto and projecting therefrom,

with free space around it for chips and oil,

and a plurality of independent tool-supports mounted upon and clasping the outside of the post, for adjustment around and longitudinally of the post.

, 4. The combination in a tool of the class specified, of a supporting-base, a plurality of posts rigidly secured thereto and projecting therefrom in a substantially parallel relation to the work, a tool-support mounted upon one of the posts for adjustment around and longitudinally of the axis thereof and means for clamping a tool upon the support in a tangential relation to the work, and means appurtenant to the support for engaging with one of the posts for effecting the said adjustment around the axis.

5. The combination in a tool of the class specified, of a supporting-base, a series of posts rigidly secured thereto and projecting therefrom in a substantially parallel relation with the work, a tool-support mounted upon one of the said posts for longitudinal and swinging adjustment and provided with means for engaging with one of the posts for effecting the said swinging adjustment, and back-rest devices adjustably mounted upon the other posts.

6. The combination in a tool of the class specified, of a supporting-base, a series of posts rigidly secured thereto and projecting therefrom in a substantially parallel relation with the work, a yoke-plate for connecting and sustaining the outer ends of the said posts, and a series of tool and back-rest supports mounted upon the said posts, and adjustable longitudinally thereof, and adjustable radially toward and from the axis of the work.

7. The combination in a tool of the class specified, of a supporting base-plate provided with means for attaching it to a toolturret, a series of posts rigidly secured to and projecting from the base-plate in substantially parallel relation with the work, a yokeplate for connecting and sustaining the outer ends of the said posts, and a series of tool and back-rest supports mounted upon the posts between the said plates for independ ent adjustment longitudinally of and radially to and from the work.

Signed at Hartford, Connecticut, this 16th day of September, 1902.

BENGT M. W. HANSON.

Witnesses:

H. E. BAILEY, WM. H. Homes. 

